Overview. Complex carbohydrates are made up of sugar molecules that are strung together in long, complex chains. Complex carbohydrates are found in foods such as peas, beans, whole grains, and vegetables.
Confidence votes 11.2K. Taught College level A&P for 27 years. The lens in the human eye is a convex lens, but it is flexible and when it is acted on by the ciliary muscle around it, the lens can be flattened to change the focus, or, when the muscle is relaxed, the lens can assume a more spherical shape.
Some of the main parts are listed and described below. 1  lens The transparent crystalline lens of the eye is located immediately behind the iris. 2  cornea The cornea is a transparent dome which serves as the outer window of the eye. 3  retina The retina is the innermost layer of the eye.